Flight Express pays $10 per duty HOUR...i.e. you're sitting at an FBO sleeping waiting for a courier, you're getting paid. You could luck out and get a run making $140/day (the max) or you could luck out (in my eyes) and get a run that's 3 hours long from door to door and make the minimum $75/day. And of course there are runs in between. As far as I know the runs start in the afternoon generally and go through late evening/early morning (like most check/freight runners). They get the annual salary by multiplying the daily salary by 260, which is the amount of days you'd work if you worked 52 weeks per year with Sat/Sun off. I believe there is 2 weeks paid vacation after 1 year but I'm not sure.
They've recently added more barons to the fleet and I'm not sure what the current upgrade time is. Keep in mind, Flight Express has no employment contract to sign. The company is VERY open to pilots interviewing and moving up, and won't blackball you.
I am good friends with the recruiter, gary, and even re-did their website. He's very upfront about the recruiting process and doesn't try to sugar coat the job. It's a good company to work with. Had I stayed in ORL I'd probably be there.
Hope that helps, good luck in your job search. Just make sure you're happy where you end up, as you could be there a bit!
~wheelsup